RECON: TNO occultation with 535985

Event between (535985) 15BF515 and star GA0860:04030640 with event index number of 2719866

Geocentric closest approach at 2029/03/14 19:55:18 UTC

J2000 position of star is 10:33:37.2 -02:20:48
Equinox of date position of star is 10:34:48.8 -02:28:05
Stellar brightness G=15.9, use SENSEUP=128 with the MallinCam and and exposure time of 2 seconds with the QHY174 camera.
Star is 169 degrees from the moon. Moon is 0% illuminated.
Apparent brightness V=22.9

Object is 20.2 AU from the Sun and 19.2 AU from the Earth.
Apparent velocity is 23.5 km/sec on the sky relative to the star, or, 6.1 arcsec/hr.
The 1-sigma error in the time of the event is 188 seconds.
The 1-sigma cross-track error in the shadow position is 4869 km.

The object has an absolute magnitude Hv=9.9
Diameter=63.1 km assuming a 5% albedo -- 2.7 sec chord
Diameter=25.8 km assuming a 30% albedo -- 1.1 sec chord
Dynamical classification is CENTAURR
 
 
 
 
 
 
 
 

Star training set for 535985, (2029/03/14 19:55UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:09:55.5 +11:49:24  1.3 15.63 159
29Del Sex      10:30:57.8 -02:53:21  4.8  1.11 168
PPM 178213     10:33:36.2 -02:48:31  8.5  0.49 168
PPM 178217     10:34:49.0 -02:39:31  9.5  0.18 169
PPM 178220     10:35:12.1 -02:36:40 10.1  0.12 169
535985         10:35:06.4 -02:29:53 15.9       169
Positions are for equinox of date

Azimuth is measured in degrees eastward from north. North is at an azimuth of 0, due East is at an azimuth of 90 degrees, due South is 180, and due West is 270.

Do not use the listing below for the RECON CPC 1100 telescopes. This is provided for other non-team facilities.

Star training set for 535985, (2029/03/14 19:55UT)
Object            RA         Dec     mag  sep  mel
Regulus        10:08:21.9 +11:58:02  1.3 15.63 159
29Del Sex      10:29:28.7 -02:44:20  4.8  1.11 168
PPM 178213     10:32:07.1 -02:39:28  8.5  0.49 168
PPM 178217     10:33:19.9 -02:30:27  9.5  0.18 169
PPM 178220     10:33:43.0 -02:27:35 10.1  0.12 169
535985         10:33:37.2 -02:20:48 15.9       169
Positions are for J2000

Event circumstances last updated at 2023/06/06 03:05:41 UT

Marc W. Buie, Southwest Research Institute

RECON